diff --git a/Cargo.lock b/Cargo.lock
index 7f901eb45..1902f076b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1105,7 +1105,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "rocksdb"
 version = "0.4.5"
-source = "git+https://github.com/ethcore/rust-rocksdb#e0e6c099d8cd156fe446009fce241d57b00cd8f4"
+source = "git+https://github.com/ethcore/rust-rocksdb#6f3c68f5f075433d206be4af6a620651cd9f8541"
 dependencies = [
  "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "rocksdb-sys 0.3.0 (git+https://github.com/ethcore/rust-rocksdb)",
@@ -1114,7 +1114,7 @@ dependencies = [
 [[package]]
 name = "rocksdb-sys"
 version = "0.3.0"
-source = "git+https://github.com/ethcore/rust-rocksdb#e0e6c099d8cd156fe446009fce241d57b00cd8f4"
+source = "git+https://github.com/ethcore/rust-rocksdb#6f3c68f5f075433d206be4af6a620651cd9f8541"
 dependencies = [
  "gcc 0.3.28 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/util/src/kvdb.rs b/util/src/kvdb.rs
index 0911b3471..66a4a02ee 100644
--- a/util/src/kvdb.rs
+++ b/util/src/kvdb.rs
@@ -109,6 +109,7 @@ impl Database {
 	/// Open database file. Creates if it does not exist.
 	pub fn open(config: &DatabaseConfig, path: &str) -> Result<Database, String> {
 		let mut opts = Options::new();
+		try!(opts.set_parsed_options("rate_limiter_bytes_per_sec=256000000"));
 		opts.set_max_open_files(config.max_open_files);
 		opts.create_if_missing(true);
 		opts.set_use_fsync(false);